cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A229086 Numbers k such that the concatenation of the divisors of k written in base 2 is a palindromic number.

Table of values

n a(n)
1 1
2 3
3 7
4 11
5 19
6 31
7 43
8 67
9 103
10 127
11 131
12 199
13 239
14 307
15 331
16 379
17 439
18 463
19 547
20 683
21 887
22 911
23 991
24 1123
25 1171
26 1291
27 1531
28 1543
29 1783
30 1951
31 2731
32 2843
33 3067
34 3079
35 3511
36 3823
37 4099
38 5107
39 5323
40 5419
41 5659
42 5851
43 6151
44 6343
45 6679
46 6871
47 6967
48 7159
49 8191

List of values

[1, 3, 7, 11, 19, 31, 43, 67, 103, 127, 131, 199, 239, 307, 331, 379, 439, 463, 547, 683, 887, 911, 991, 1123, 1171, 1291, 1531, 1543, 1783, 1951, 2731, 2843, 3067, 3079, 3511, 3823, 4099, 5107, 5323, 5419, 5659, 5851, 6151, 6343, 6679, 6871, 6967, 7159, 8191]